Making elecret within nimh AA cell

[ewizard]

Thanks Tyson. I know a guy on another forum where they use small NiMh and other small battery chemistries and he is an extreme battery guru who I swear understands small batteries better than some of the manufacturers of batteries. You might run some questions by him - he's very helpful and professional. I'm going to send you a PM on that.
BTW can you tell me what transistor you are using in your circuit and is the run battery the one with the bigger symbol? Any coil details?

[SkyWatcher]

Hi ewizard, thanks for interest. Someone else drew up that circuit and the bigger battery symbol is the source which in my case is a 10 amp radio shack power supply. Transistor is an NTE392 and my coil is bifilar 18 gauge around .5 ohms per coil with a ferrite core, so no heat. And also today the voltage of the 3 - generic cells in series are back to 3.7 volts, granted there voltage falls under the load of charging the parallel 1.2 lenmark nimh AA's but they are still able to impart charge to them and charges a 2400uf cap instantly still. These latter tests are just direct connections to parallel cells and capacitor.
peace love light
Tyson

[sucahyo]

Hi folks, i let the 3 - nimh baterries charge the paralleled lenmark nimh AA cells for a few hours this time only 2 in parallel and voltage went from 1.262 volts to 1.283 volts and the 3 nimh AA cells in series is now resting at 3.67 volts, though slower to climb back to that voltage. it could be that i'm exceeding the load for the effect to maintain itself longer, or this is just normal.

If you charge the battery with DC and then radiant charger alternatingly for many times, I think you will get a recovered battery instead of just electret. Unless the internal is completely dry.

[sucahyo]

Thanks Tyson. I know a guy on another forum where they use small NiMh and other small battery chemistries and he is an extreme battery guru who I swear understands small batteries better than some of the manufacturers of batteries.

Make sure that he will be willing to build radiant charger. If he never build one, he may dismiss this.

In case SG is too hard, suggest this:



Not my most efficient but should work. KSC5027 can be replaced with 2N3055 or better NPN power transistor. my transformer resistance is around 6 ohm. Please make sure that he notice that the charged battery is not at usual location.

Other properties that are different from conventional charger:
- charging part can output more than 100V if no load is attached
- charging part voltage will change according to load impedance. Less impedance less voltage.
- If built properly, the charged battery would never get hot. If its get hot, reduce the output by increasing transistor base resistance.

[SkyWatcher]

Hi folks, hi sucahyo, it could be that the cell has dried out to some degree, since when i bought them they were useless to most folks, they would have brought them back to store and i'm the lucky one to have bought them, lol. Who knows maybe i was meant to buy them to see what may be hints towards this effect in a battery. I notice electret - tret sure sounds like the egyptian TET.
peace love light
Tyson